#include <stdio.h>
#include <string.h>
#include <unistd.h>
int main()
{
	const char *msg0="hello printf\n";
	const char *msg1="hello fwrite\n";
	const char *msg2="hello write\n";
	
	printf("%s", msg0);
	fwrite(msg1, strlen(msg1), 1, stdout);
	write(1, msg2, strlen(msg2));
	
	fork();
	
	return 0;
}

